Unknown keyframe intepolation mode

I've put some of my animation in Constant Interpolation and the HTML export run smoothly but the json seems to not handle this interpolation. The issue is that I've lots of animated objects and can't figure which one is stuck in Constant Interpoldation so I could put him into Linear Interpolation. i've tried to bake animation on this scene but it still show the error Is there a way to force type of interpolation in the export?

You are using the Set Shader Node Param logic node to assign Value in the "Text" material on the "Text" object. But the problem is that you have the "Do not Export" flag on this material. This leads to some bad behavior. I added an additional check so that this kind of bugs would be more evident.